I can't buy through assemblies

[Siai]

Hello everyone. I have a problem with purchasing characters, that is, I have a working store, but if I go to the assembly of items (haze, infernus, kelvin, lash, vindicta, paradox, seven, Yamato) I can not buy items through the assembly, through the store I can search for each item separately and buy, but by the assembly for these characters I just can not do it. when I change the resolution from 4:3 to 16:10 (and by the way, I am waiting for an official fix for the bug with the health bar on 4:3) and when I change the resolution, such a problem as buying by assembly disappears. is it possible to somehow fix the bug with the assembly on 4:3